function imagePhoto=loadPhoto(fileName)
% this function load photo files saved by camera and converted to matlab
% version
    imageOri=dlmread(fileName);
    imageDigital=double(imageOri);
    [x,~]=size(imageDigital);
    imagePhoto=imageDigital(1:x,2:(x+1));
    imagePhoto=rot90(imagePhoto);
    fprintf( '%s\n', ['load photo ' fileName]);
